I should know better than seeking advice from Atlas (we all know how that goes), but anywho, I have a conundrum. I recently met a girl who has come over with friends to my house twice, and we really have hit it off. I want to invite her over to smoke and listen to some records tonight, but we just hung out on Sunday and Monday; my natural instinct is to do what I always do - play it cool and wait a few days. But now I'm starting to wonder if I dramatically overthink these things.
You should invite her over anyway while being understanding if she's busy but leave the invitation open for later this week.
^ seconding this.
If you're into her, go for it!